1950G-0-B-24

~~EERE~~ **SERIES 1950G** EXPLOSION-PROOF DIFFERENTIAL PRESSURE SWITCH Explosion-proof, Weatherproof, Compatible with Natural Gases 1/8 FEMALE NPT 1-15/32 [37.30] NOTE: 1950-02: 7-3/4˝ [196.9] DIA. 

1/8 FEMALE NPT 1-15/32 [37.30] NOTE: 1950-02: 7-3/4˝ [196.9] DIA. EXTERNAL LOW PRESSURE CONNECTION 3/8 [9.53] X 4-11/32˝ [110.3] DEPTH. FOR GROUND CAPTIVE SCREW 27/32 [21.43] DRAWING 28-700175-00 FROM COMPLETE DIMENSIONS REQUEST HOLES EQUALLY SPACED ON[2] Ø17/64 [6.75] MOUNTING \ oO _. % ~~“~~ A ~~R~~ 27/32 DEPARTMENTOUR CUSTOMER SERVICE A 4-7/8 [123.83] B.C. VENT DRAIN [21.43] PLUG 1/8 FEMALE NPT HIGH RANGE ADJUSTMENT SCREW PRESSURE CONNECTION 5-7/16 3/8 [9.53] [138.13] 1-23/32 [43.64]3-1/2 [88.90] 1/2 FEMALE NPTELECTRICAL CONNECTION combines the best **SPECIFICATIONS** Series 1950 Pressure Switch with the benefit of natural **Service:** Air and compatible combustible **Power Requirements:** 24 VDC ±10%. gases. 120 or 240 VAC ±10% optional. 2813 II 2G Ex db **Wetted Materials:** Contact factory. **Electrical Connections:** Internal **Temperature Limits:** 0 to 140°F terminal block. (-17 to 60°C). **Note:** Set point drift **Process Connections:** 1/8˝ female may occur with ambient temperature NPT. changes. **Mounting Orientation:** Diaphragm in **Pressure Limits:** 45 in w.c. (11.2 kPa) vertical position. Consult factory for other continuous; 10 psig (68.95 kPa) surge. position orientations. **Enclosure Rating:** NEMA 3 (IP54), **Set Point Adjustment:** Screw type on NEMA 7 and 9. top of housing. **Switch Type:** 1 form C relay (SPDT). **Weight:** 2 lb 15.7 oz (1.35 kg). **Electrical Rating:** 10 A, 120/240 VAC, **Compliance:** ATEX, CE, CSA, FM, 28 VDC. Resistive 50 mA, 125 VDC. IECEx, UL. - ~~Pt PT~~ **MODEL CHART UL, CSA, FM ATEX Range Approximate Deadband** ~~e~~ **Model1950G-00-B-** ~~s~~ **24-NA** ~~ee~~ **Model1950G-00-B-24** .07 to .15 **in w.c.** ~~Pe~~ .04 **Min. Set Point** .06 **Max. Set Point** ~~eee~~ **1950G-0-B-24-NA 1950G-0-B-24** .15 to .50 .06 .11 **1950G-1-B-24-NA 1950G-1-B-24** .4 to 1.6 .11 .29 **1950G-5-B-24-NA 1950G-5-B-24** 1.4 to 5.5 .4 .9 **1950G-10-B-24-NA 1950G-10-B-24** 3 to 11 .9 1.8 **1950G-20-B-24-NA 1950G-20-B-24** 4 to 20 1.2 3.0 ~~Pe~~ **240 VAC Models: 1950G-XX-B-240-NA; 120 VAC Models: 1950G-XX-B-120-NA** 

**Series 1950G Explosion-Proof Differential Pressure Switch** combines the best features of the popular Dwyer[®] Series 1950 Pressure Switch with the benefit of natural gas compatibility. Units are rain-tight for outdoor installations, and are UL listed for use in Class I, Groups A, B, C, and D; Class II, Groups E, F, and G and Class III atmospheres, Directive 2014/34/EU (ATEX) Compliant for 2813 II 2G Ex db IIB+H2 T6, CSA and FM approved for Class I, Div. 1, Groups B, C, D; Class II, Div. 1, Groups E, F, G and Class III atmospheres. IECEx Ex db IIB+H2 T6 (-40°C<Ta<+60°C). The 1950G is very compact, about half the weight and bulk of equivalent conventional explosion-proof switches. Easy access to the SPDT relay and power supply terminals is provided by removing the top plate of the aluminum housing. A supply voltage of 24 VDC, 120 or 240 VAC is required. A captive screw allows the cover to swing aside while remaining attached to the unit. Adjustment to the set point of the switch can be made without disassembly of the housing. **BENEFITS/FEATURES** - 

- Compatible with natural gas making it suitable for use in those applications 

- External set point screw provides easy access that simplifies making adjustments without opening or disassembling enclosure 

- Easily accessible electrical connection simplifies the installation 

## **APPLICATIONS** 

- Natural gas applications 

- Process applications 

- All-weather applications 

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